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Create an Array of Objects

May 20, 2011

      You can create copies of objects that array in rectangular or polar pattern.

      For rectangular arrays, you can specify the number of rows and columns as well as the interval; for polar arrays, you can specify the number of copies of the objects and determine whether the copies are rotated.

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Create Rectangular Arrays

      You should specify the number of rows and columns, offset distance and angle before you create rectangular arrays.


To create a rectangular array

  1. Choose Modify > Array.

  2. In the array dialog box, click Rectangular Array.

  3. Click the select objects button, select entities to array in your drawing.

  4. In the array dialog box,specify the rows and columns offset distance and angle of offset.

  5. Click OK.

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Command line ARRAY

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To create a rectangular array, select the object to copy (A), type the number of rows and columns, and then specify the distance between each row (B) and column (C)

Create Polar Arrays

       You can specify a center or base point to copy the selected objects to create a polar array. The polar array is drawn clockwise or counterclockwise depending on whether you type a positive or negative value. The radius is determined by the distance between the specified center point and a reference or base point on the last selected object.


To create a polar array

  1. Choose Modify > Array.

  2. In the array tab, click Polar Array.

  3. Click the select objects button, select entities to array in your drawing.

  4. In the array tab, choose method and values you desired.

  5. Click OK.

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Command line ARRAY

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To create a polar array, select the object to copy (A), specify the center point of the array (B), and then specify the number of items to array, the angle the array is to fill, and whether to rotate the items

Array in 3D

       3DARRY command is designed to create 3D arrays in the 3D space. The arrays include both rectangular and polar array. Besides specifying the number of rows (X direction) and columns (Y direction), you have to give the number of layer (Z direction).


To create a three dimensional rectangular array

  1. Choose Modify > 3D Operation > 3D Array.

  2. Select the objects, and then press Enter.

  3. In the command line prompt , choose Rectangular.

  4. Type the number of rows in the array.

  5. Type the number of columns.

  6. Type the number of levels.

  7. Specify the vertical distance between the rows.

  8. Specify the horizontal distance between the columns.

  9. Specify the depth between the levels.

Command line 3DARRAY

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To create a three dimensional rectangular array, select the object to copy (A), type the number of rows, columns, and levels, and then specify the distance between each row (B), column (C),and level (D)

To create a three dimensional polar array

  1. Choose Modify > 3D Operation > 3D Array.

  2. Select the objects, and then press Enter.

  3. In command line prompt, choose Polar.

  4. Type the number of copies to make, including the original selection set.

  5. Specify the angle the array is to fill, from 0 to 360 degrees. The default setting for the angle is 360 degrees. Positive values create the array in a counterclockwise direction; negative values create the array in a clockwise direction.

  6. In command line prompt, choose one of the following:

  • Yes Rotate Objects to rotate objects as they are arrayed.

  • No Do Not Rotate to retain the original orientation of each copy as it is arrayed.

  1. Specify the center point of the array.

  2. Specify a second point along the central axis of the array.

Command line 3DARRAY

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To create a three dimensional polar array, select the object to copy (A), type the number of items to array,specify the angle the array is to fill (B), and then specify the center point of the array (C) and a second point along the central axis of the array (D)

Limit the Size of Arrays

       If there are a large number of rows and columns for a rectangular array, the system takes a long time to create the copies. By default, the number of array elements generate by one command is not over 100,000. The value is stored in the system variable MaxArray. It is ranges from 100 to 10000000. If you want to change the value of MaxArray, you must type MaxArray with the capitalization shown.


Commands Reference

3DARRAY: Creates a three-dimensional array

ARRAY: Creates multiple copies of objects in a pattern

SETTINGS: Specifies settings for Snap mode, grid, and polar and object snap tracking

UCS: Manages user coordinate systems

UNITS: Controls coordinate and angle display formats and precision

System Variables Reference

ANGBASE: Sets the base angle to 0 with respect to the current UCS

ANGDIR: Sets the direction of positive angles

SNAPANG: Sets the snap and grid rotation angle for the current viewport


 

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